Answer
$135^\circ, 225^\circ$
Work Step by Step
Given $sec\theta=\frac{1}{cos\theta}=-\sqrt 2$ and $\theta\in[0^\circ,360^\circ)$, we have $cos\theta=-\frac{\sqrt 2}{2}$, and we can find $\theta=135^\circ, 225^\circ$
Precalculus (6th Edition)
by Lial, Margaret L.; Hornsby, John; Schneider, David I.; Daniels, Callie
Published by
Pearson
ISBN 10:
013421742X
ISBN 13:
978-0-13421-742-0
Chapter 5 - Trigonometric Functions - Quiz - Page 537: 16
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